When w3m is launched, if no other options are specified, it attempts to
read HTTP_HOME and WWW_HOME from the environment and upon finding a
value for one of these load the url specified. Once launched, though,
w3m provides no convenience for navigating to the home page.
Here, that ability is added. A new command GOTO_HOME is defined with a
default key binding of C-_.
The XHTML standard encompasses the XML standard.
From the beginning, the XML standard [1] has always included required
support for five character entities:
1. the ampersand (&) as &
2. the left angle bracket (<) as <
3. the right angle bracket (>) as >
4. the double-quote character (") as "
5. the apostrophe or single-quote character (') as '
See section "2.4 Character Data and Markup" of the XML standard [1]
for further details.
Add support for the character single-quote character entity (')
in order to fully support XHTML pages.
[1]: https://www.w3.org/TR/REC-xml/
Signed-off-by: Kyle J. McKay <mackyle@gmail.com>
Since Google gives usable search results to Lynx but not to w3m, and
many other sites block Lynx but /not/ w3m, we want to be able to set
the User Agent string on a per-site basis.
Adding on command line the user agent add a duplicate header:
```
./w3m -header "User-Agent: Mozilla" http://localhost:9999
GET / HTTP/1.0
User-Agent: w3m/0.5.3+git20190105
Accept: text/html, text/*;q=0.5, image/*, application/*, message/*, x-scheme-handler/*, audio/*, video/*, inode/*
Accept-Encoding: gzip, compress, bzip, bzip2, deflate
Accept-Language: en;q=1.0
Host: localhost:9999
Pragma: no-cache
Cache-control: no-cache
User-Agent: Mozilla
```
As a result most server will take the first given; the default
w3m_version or the one defined on config `user_agent`
With this patch we can now override `User-Agent` from command line
